Index: tracing/tracing/ui/tracks/slice_group_track.html |
diff --git a/tracing/tracing/ui/tracks/slice_group_track.html b/tracing/tracing/ui/tracks/slice_group_track.html |
index f8f0f3949f9480b73ab3d90fa91ff9d4339f8b30..bcb4db97e51d872da746e280c06e0a751b42eec0 100644 |
--- a/tracing/tracing/ui/tracks/slice_group_track.html |
+++ b/tracing/tracing/ui/tracks/slice_group_track.html |
@@ -27,7 +27,7 @@ tr.exportTo('tr.ui.tracks', function() { |
decorate: function(viewport) { |
tr.ui.tracks.MultiRowTrack.prototype.decorate.call(this, viewport); |
- this.classList.add('slice-group-track'); |
+ Polymer.dom(this).classList.add('slice-group-track'); |
this.group_ = undefined; |
// Set the collapse threshold so we don't collapse by default, but the |
// user can explicitly collapse if they want it. |